Nucleons at finite temperature and low density in Faddeev equation approach

2012 ◽  
Vol 85 (1) ◽  
Author(s):  
Cheng-fu Mu ◽  
Yin Jiang ◽  
Peng-fei Zhuang ◽  
Yu-xin Liu
Keyword(s):  
Faddeev Equation ◽  
Finite Temperature ◽  
Low Density ◽  
Equation Approach

On the combined Doppler and pressure broadening of nonresonant spectral lines

1988 ◽  
Vol 66 (4) ◽  
pp. 341-348
Author(s):  
M. A. Diaz ◽  
F. Palomares ◽  
J. Veguillas
Keyword(s):  
Kinetic Equation ◽  
Inelastic Collisions ◽  
Spectral Lines ◽  
The Other ◽  
Low Density ◽  
Doppler Broadening ◽  
Equation Approach ◽  
Pressure Broadening ◽  
Debye Relaxation ◽  
Collision Model

An explicit spectral function for nonresonant transitions has been derived that includes pressure broadening, Doppler broadening, and diffusional narrowing. This has been accomplished through a kinetic-equation approach. The kinetic equation has been resolved by using an extension of the Bhatnagar–Gross–Krook collision model to inelastic collisions, characterized by two collision frequencies: one associated with elastic collisions and the other associated with inelastic ones. The high- and low-density limits have been discussed, and the standard formula for Debye relaxation has been reproduced. Finally, a discussion concerning the above aspects and their possible extensions has been included as well.

scholarly journals The low density limit in finite temperature case

1992 ◽  
Vol 126 ◽  
pp. 25-87 ◽  
Author(s):  
L. Accardi ◽  
Y. G. Lu
Keyword(s):  
Physical Meaning ◽  
Finite Temperature ◽  
Low Density ◽  
Density Limit ◽  
Quantum Hamiltonian ◽  
Hamiltonian Model ◽  
Limit Procedure ◽  
Low Density Limit

The low density limit in the Boson Fock case has been investigated in [1] where also the physical meaning and their motivations have been explained (cf. also [0]). From these papers one knows how the number processes can be obtained from a quantum Hamiltonian model via a certain limit procedure.

scholarly journals Energy-level displacement of excitednpstates of kaonic deuterium in a Faddeev-equation approach

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
M. Faber ◽  
M. P. Faifman ◽  
A. N. Ivanov ◽  
J. Marton ◽  
M. Pitschmann ◽  
...  
Keyword(s):  
Energy Level ◽  
Faddeev Equation ◽  
Equation Approach ◽  
Kaonic Deuterium

Application of Improved Voltage Compensation in the SEM to Imaging of Organic Materials

1973 ◽  
Vol 31 ◽  
pp. 444-445
Author(s):  
P.J. Killingworth ◽  
M. Warren
Keyword(s):  
Electron Beam ◽  
Organic Materials ◽  
Operating Parameters ◽  
Low Density ◽  
Beam Diameter ◽  
Incident Electron Beam ◽  
Specimen Material ◽  
Voltage Compensation ◽  
Selection Of ◽  
Scanning Electron

Ultimate resolution in the scanning electron microscope is determined not only by the diameter of the incident electron beam, but by interaction of that beam with the specimen material. Generally, while minimum beam diameter diminishes with increasing voltage, due to the reduced effect of aberration component and magnetic interference, the excited volume within the sample increases with electron energy. Thus, for any given material and imaging signal, there is an optimum volt age to achieve best resolution.In the case of organic materials, which are in general of low density and electric ally non-conducting; and may in addition be susceptible to radiation and heat damage, the selection of correct operating parameters is extremely critical and is achiev ed by interative adjustment.

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